/* ========== CSS Variables ========== */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-card: #1c2333;
  --bg-sidebar: #0d1117;
  --accent: #04c5bb;
  --accent-hover: #06e6db;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --border: #21262d;
  --radius: 12px;
  --radius-sm: 8px;
  --sidebar-width: 280px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== Reset ========== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
}

/* ========== Sidebar ========== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px 20px;
  flex: 1;
}

.avatar-wrap {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  padding: 3px;
  background: linear-gradient(135deg, var(--accent), #6366f1);
  margin-bottom: 16px;
  flex-shrink: 0;
}

.avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  border: 3px solid var(--bg-sidebar);
}

.sidebar-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 4px;
  text-align: center;
}

.sidebar-title {
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 30px;
  height: 20px;
  text-align: center;
}

.cursor {
  animation: blink 1s step-end infinite;
  color: var(--accent);
  font-weight: 300;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Nav */
.sidebar-nav {
  width: 100%;
  margin-bottom: auto;
}

.sidebar-nav ul {
  list-style: none;
}

.sidebar-nav li {
  margin-bottom: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.04);
}

.nav-link.active {
  color: var(--accent);
  background: rgba(4, 197, 187, 0.08);
}

.nav-link i {
  width: 20px;
  text-align: center;
  font-size: 0.9rem;
}

/* Social */
.sidebar-social {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  justify-content: center;
}

.sidebar-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: all var(--transition);
}

.sidebar-social a:hover {
  background: var(--accent);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

.sidebar-footer {
  margin-top: 16px;
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ========== Mobile Header ========== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border);
  z-index: 200;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
}

.mobile-avatar img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
}

.mobile-name {
  font-weight: 600;
  font-size: 0.95rem;
  flex: 1;
}

.menu-toggle {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 8px;
}

/* ========== Main Content ========== */
.main-content {
  margin-left: var(--sidebar-width);
  padding: 50px 60px 40px;
  min-height: 100vh;
}

/* ========== Section ========== */
.content-section {
  display: none;
  animation: fadeIn 0.4s ease;
}

.content-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-header {
  margin-bottom: 40px;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
}

.section-title .accent {
  color: var(--accent);
}

.section-subtitle {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ========== About Section ========== */
.about-intro {
  max-width: 720px;
  margin-bottom: 32px;
}

.about-intro p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.about-intro strong {
  color: var(--text-primary);
}

.about-details {
  margin-bottom: 40px;
}

.info-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.info-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-label i {
  margin-right: 6px;
  color: var(--accent);
}

.info-value {
  font-size: 0.95rem;
  font-weight: 500;
}

/* About Cards */
.about-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.about-card {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.about-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.about-card-icon {
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.about-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.about-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Fun Facts */
.fun-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.fact {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.fact-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.fact-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ========== Skills Section ========== */
.skills-category {
  margin-bottom: 32px;
}

.skills-cat-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.skills-cat-title i {
  color: var(--accent);
  margin-right: 8px;
  width: 20px;
  text-align: center;
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-badge {
  padding: 8px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  cursor: default;
}

.skill-badge:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ========== Projects Section ========== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  color: var(--text-primary);
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  color: var(--text-primary);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.project-icon {
  font-size: 1.5rem;
  color: var(--text-muted);
}

.project-stats {
  display: flex;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.project-stats i {
  margin-right: 4px;
  color: var(--accent);
}

.project-name {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.project-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 16px;
}

.project-lang {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.projects-footer,
.blog-footer {
  text-align: center;
  margin-top: 16px;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border: 1px solid var(--accent);
  border-radius: 50px;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all var(--transition);
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

/* ========== Blog Section ========== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.blog-loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  color: var(--text-primary);
}

.blog-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  color: var(--text-primary);
}

.blog-thumb {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--bg-secondary);
}

.blog-body {
  padding: 20px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.blog-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.blog-tag {
  font-size: 0.7rem;
  padding: 3px 10px;
  background: rgba(4, 197, 187, 0.1);
  color: var(--accent);
  border-radius: 50px;
}

/* ========== Stats Section ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  gap: 5px;
  margin-bottom: 5px;
}

.stats-streak,
.stats-trophy,
.stats-graph {
  margin-bottom: 5px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 5px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  max-width: 25%;
}

.stat-card img {
  width: 100%;
  height: auto;
}

.stat-card.wide {
  width: 100%;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .main-content {
    padding: 50px 30px 30px;
  }
  .fun-facts {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition);
    z-index: 300;
    width: 260px;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .mobile-header {
    display: flex;
  }

  .main-content {
    margin-left: 0;
    padding: 80px 16px 30px;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .projects-grid,
  .blog-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .fun-facts {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-cards {
    grid-template-columns: 1fr;
  }

  .info-list {
    grid-template-columns: 1fr;
  }

  /* Overlay */
  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 250;
    display: none;
  }

  .sidebar-overlay.show {
    display: block;
  }
}

@media (max-width: 480px) {
  .fun-facts {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .fact {
    padding: 16px 8px;
  }

  .fact-number {
    font-size: 1.4rem;
  }
}